Setting up a friend’s WP blog on a VPS Debian box. Open Book Plugin wouldn’t work insisting that curl wasn’t present on the system (despite apt-get update && apt-get install php5-curl showing it’s the most recent). Loaded a php file to test if it was a recognized extension by creating a file named info.php in the web root for that site including the following code:<?php phpinfo(); ?>After pulling this document up in a browser, I deleted the file :). This pointed me in the right direction showing that the PHP.ini was deferring to /etc/php5/apache2/conf.d/curl.ini I checked there and it was extension=curl.so as expected, but obviously it wasn’t being correctly located. Did the following as root locate curl.so and found it @ /usr/lib/php5/20090626/curl.so Commented out the current curl.ini file for a byte trail of my actions and appended extension=/usr/lib/php5/20090626/curl.so Then a quick service apache2 restart and we were back in business. Thanks to this blog for pointing me in the right direction: http://www.ivankristianto.com/os/ubuntu/howto-install-curl-in-php-apache/379/